The Megahalems Rev. B design is very peculiar because, besides being pratically a tower design cooler, it is actually made by two independent heatsinks.

click to enlargeFigure 3: Front view.

In Figure 4 we can see the six copper heatpipes, with 6 mm diameter each. Note the base core is made almost only by the heatpipes, side by side.

click to enlargeFigure 4: Side view.

In Figure 5 we can see the top side of Megahalems B. We can see cleary the gap between the heatsinks. The top fin is not made of aluminum, but of stainless steel (according to the manufacturer this material was used in order to keep the shiny aspect longer).

click to enlargeFigure 5: Top view.

In Figure 6 we can see the cooler base, with a near mirrored finishing.